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Should I preventDefault with Next.js server actions?

I am using Next server actions, but I want to include client side validation that prevents submit if there are any errors. If I include e.preventDefault, nothing happens. If I exclude e.preventDefault, the post is always sent. When I try to type into the input again, it does not change the value until 2 characters are entered.

const [state, action] = useActionState(logExample, initialFormState);

  const form = useForm({
    ...formOpts,
    transform: useTransform((baseForm) => mergeForm(baseForm, state!), [state]),
    validators: {
      onChange: ({ value }) =>
        value.text.trim().length === 0 && { fields: { text: 'Required' } },
    },
  });

<form
  action={action}
      onSubmit={(e) => {
        // e.preventDefault();
        form.handleSubmit();
      }}
>
...
</form>

const [state, action] = useActionState(logExample, initialFormState);

  const form = useForm({
    ...formOpts,
    transform: useTransform((baseForm) => mergeForm(baseForm, state!), [state]),
    validators: {
      onChange: ({ value }) =>
        value.text.trim().length === 0 && { fields: { text: 'Required' } },
    },
  });

<form
  action={action}
      onSubmit={(e) => {
        // e.preventDefault();
        form.handleSubmit();
      }}
>
...
</form>

How do I prevent submit on validation errors? How do I get input to trigger the change event after an invalid submit attempt? Example here: https://stackblitz.com/edit/nextjs-dbp2u3qq?file=app%2Fexample-form.tsx

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Should I preventDefault with Next.js server actions?

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